Not at the moment IIRC as there was too much and still is to a certain extent, an unpredictability over what stock works what service right up until the last minute. Mostly due to the issues re Classic HSTs and the unreliability of both Classics and Refurbs when they were first introduced.Does ScotRail accept reservations on the I7Cs at all?
It was often the case that a classic HST or Refurb with reservations was getting subbed for 158s and 170s on an adhoc basis when things went pear shaped, so passengers were feeling entitled to a seat on the subbed unit/set that never existed and thus couldn't be enforced. Lot of confusion, lot of full and standings, and a lot of complaints. If anybody remembers late 2018 early 2019, this was the norm for a good couple of months.
Going forward when there's enough stability, they will reintroduce reservations, as per the situation pre HST.